Linear 2510-373, Siren Sensor Op W/Hold Open

Linear 2510-373 Siren Sensor with Hold Open Technical Details

The Linear 2510-373 is an emergency access sensor designed to open a compatible gate when it detects an emergency vehicle siren. The package is commonly associated with the SOS-IX style siren-operated sensor and includes a hold-open interface for applications that require the gate to remain open after activation.

This product is not a standard radio receiver or loop detector. It should be wired and configured as an emergency access control device according to the gate operator manual and the local authority requirements for the site.

Compatible With

• Compatible gate operators that accept a dry contact or accessory input from a properly wired emergency access device
• Linear, OSCO, Nice/Nortek, and other gate systems when the control input and power requirements are matched
• Residential communities, commercial gates, airport, government, industrial, and military gate access points
• Applications requiring siren activation with hold-open interface behavior
• Not a substitute for fire department key switch, Knox, strobe, or other emergency access equipment required by local code

Features & Specifications

Also Known As / Related Part Numbers

• 2510-373
• 2510373
• Linear siren operated sensor
• SOS-IX siren operated sensor
• Siren sensor with hold open
• 2510-285 hold-open interface
• NIC-2510-373
• NIC2510373

Technician Note

After installation, test the sensor with the proper emergency access procedure and verify that the hold-open behavior does not interfere with normal gate safety operation or required closing controls.

Before Ordering

• Confirm the operator has a suitable input for the device
• Confirm available accessory power matches the sensor requirements
• Check whether the site requires a specific emergency access method by local authority
• Plan sensor location for siren detection and weather exposure
• Test activation, reset, and hold-open behavior after installation

Professional Advisory

Emergency access equipment affects vehicle and pedestrian safety. Installation should not bypass photo eyes, edges, loops, or monitored entrapment protection. Use a qualified gate technician and coordinate with the local authority when emergency response access is involved.

Questions & Answers

What does the Linear 2510-373 do?

It senses emergency vehicle sirens and sends an open command to a compatible gate operator when properly installed.

What is the hold-open feature for?

The hold-open interface is used to help keep the gate open after emergency activation, depending on the wiring and operator configuration.

Will it work with every gate operator?

It may be used with operators that provide the correct power and control input, but the wiring and site requirements must be confirmed.

Is this the same as a remote receiver?

No. It is a siren-operated emergency access sensor, not a radio receiver for handheld remotes.

Can this replace local fire department access requirements?

No. Some sites still require key switches, Knox equipment, strobe devices, or other approved access methods. Check the local authority requirements.